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  1. mousecheese

    What is preventing the scissor jacks from collapsing?

    Thank you
  2. mousecheese

    What is preventing the scissor jacks from collapsing?

    Hello, I have some questions about the scissor jacks. Is it the friction between the lead screw thread and the two nuts at the front and back sides of the jack? What type of friction is helping the jack to uphold the load to a specified weight without collapsing? Is there a formula? Thanks
  3. mousecheese

    Equations for two stage scissor jack

    I searched many books and websites but there is no example on such system. How come?
  4. mousecheese

    Equations for two stage scissor jack

    Hello, I have a two stage scissor jack likes the one shown in the photo but with the addition that a DC motor is connected to the knob. Could anybody please show me how to obtain the dynamics equations for this system? Thank you https://en.wikipedia.org/wiki/Laboratory_scissor_jack

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